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Use the M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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Repair the CAN bus line. (Refer to GROUP 54C - Troubleshooting ).
Then go to Step 6.
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Use M.U.T.-III to check the diagnosis code for the ASC system.
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Q.
Is the diagnosis code set?
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Carry out the diagnosis for the diagnosis code (Refer to ).
Then go to Step 6.
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Use M.U.T.-III to check if the diagnosis code is set in the combination meter system.
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Q.
Is the diagnosis code set?
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Perform troubleshooting for the combination meter. (Refer to GROUP 54A - Combination
Meter, Troubleshooting ). Then go to Step 6.
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Using M.U.T.-III, check that the diagnosis code is set in the ETACS system.
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Q.
Is the diagnosis code set?
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Perform troubleshooting for ETACS-ECU. (Refer to GROUP 54A - ETACS, Troubleshooting).
Then go to Step 6.
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Q.
Does the brake warning lamp turn ON and OFF normally?
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The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to Cope with Intermittent Malfunction).
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Replace the hydraulic unit assembly (integrated with ASC-ECU) (Refer to ).
Then go to Step 6.
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Q.
Does the brake warning lamp turn ON and OFF normally?
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This diagnosis is complete.
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